
const Print = function (dom, options, type) {
  if (!(this instanceof Print)) return new Print(dom, options, type);

  this.options = this.extend({
    'noPrint': '.no-print'
  }, options);

  if ((typeof dom) === "string") {
    this.dom = document.querySelector(dom);
  } else {
    this.isDOM(dom)
    this.dom = this.isDOM(dom) ? dom : dom.$el;
  }

  this.init(type);
};
Print.prototype = {
  init: function (type) {
    const content = this.getStyle(type) + this.getHtml();
    this.writeIframe(content);
  },
  extend: function (obj, obj2) {
    for (let k in obj2) {
      obj[k] = obj2[k];
    }
    return obj;
  },

  getStyle: function (type) {
    let str = "",
      styles = document.querySelectorAll('style,link');
    for (let i = 0; i < styles.length; i++) {
      str += styles[i].outerHTML;
    }
    str += "<style>" + (this.options.noPrint ? this.options.noPrint : '.no-print') + "{display:none;}</style>";
    if (type === 3) {
      // 添加热敏打印样式
      str += `
        <style>
          @page {
            margin: 0;
            size: 80mm 50mm;
          }
          body {
            margin: 0;
            padding: 2px 0;
            width: 100mm;
            text-align: center;
          }
          .barcode-container {
            width: 100%;
            text-align: center;
            padding: 0;
            margin: 0 auto;
          }
          .barcode-container img {
            width: 86mm;  /* 进一步增加图片宽度 */
            height: auto;
            margin: 0 auto;
            display: block;
          }
          .barcode-container p {
            margin: 2px 0;
            text-align: center;
            font-size: 18px;  /* 继续增加文字大小 */
            font-weight: bold;  /* 加粗文字 */
          }
          /* 针对条形码图片的特殊处理 */
          img[src*="barcode"] {
            transform: scale(1.2);  /* 稍微放大条形码 */
            transform-origin: center center;
            margin: 2px auto;
          }
          * {
            page-break-inside: avoid;
            page-break-after: avoid;
            page-break-before: avoid;
          }
        </style>
      `;
    }

    //  pop_print_type: [
    //       {
    //         text: '飞翔面单',
    //         id: 1
    //       },
    //       {
    //         text: '仓库打包单',
    //         id: 2
    //       },
    //       {
    //         text: '热敏条码单',
    //         id: 3
    //       }
    //     ],
    return str;
  },

  getHtml: function () {
    let inputs = document.querySelectorAll('input');
    let textareas = document.querySelectorAll('textarea');
    let selects = document.querySelectorAll('select');

    for (var k = 0; k < inputs.length; k++) {
      if (inputs[k].type === "checkbox" || inputs[k].type === "radio") {
        if (inputs[k].checked === true) {
          inputs[k].setAttribute('checked', "checked")
        } else {
          inputs[k].removeAttribute('checked')
        }
      } else if (inputs[k].type === "text") {
        inputs[k].setAttribute('value', inputs[k].value)
      } else {
        inputs[k].setAttribute('value', inputs[k].value)
      }
    }

    for (var k2 = 0; k2 < textareas.length; k2++) {
      if (textareas[k2].type === 'textarea') {
        textareas[k2].innerHTML = textareas[k2].value
      }
    }

    for (var k3 = 0; k3 < selects.length; k3++) {
      if (selects[k3].type == 'select-one') {
        var child = selects[k3].children;
        for (var i in child) {
          if (child[i].tagName == 'OPTION') {
            if (child[i].selected == true) {
              child[i].setAttribute('selected', "selected")
            } else {
              child[i].removeAttribute('selected')
            }
          }
        }
      }
    }

    // 包装打印内容
    var printContent = '<div class="barcode-container">' + this.dom.outerHTML + '</div>';
    return printContent;
  },

  writeIframe: function (content) {
    var w, doc, iframe = document.createElement('iframe'),
      f = document.body.appendChild(iframe);
    iframe.id = "myIframe";
    //iframe.style = "position:absolute;width:0;height:0;top:-10px;left:-10px;";
    iframe.setAttribute('style', 'position:absolute;width:0;height:0;top:-10px;left:-10px;');
    w = f.contentWindow || f.contentDocument;
    doc = f.contentDocument || f.contentWindow.document;
    doc.open();
    doc.write(content);
    doc.close();
    var _this = this
    iframe.onload = function () {
      _this.toPrint(w);
      setTimeout(function () {
        document.body.removeChild(iframe)
      }, 100)
    }
  },

  toPrint: function (frameWindow) {
    try {
      setTimeout(function () {
        frameWindow.focus();
        try {
          if (!frameWindow.document.execCommand('print', false, null)) {
            frameWindow.print();
          }
        } catch (e) {
          frameWindow.print();
        }
        frameWindow.close();
      }, 10);
    } catch (err) {
      console.log('err', err);
    }
  },
  isDOM: (typeof HTMLElement === 'object') ?
    function (obj) {
      return obj instanceof HTMLElement;
    } :
    function (obj) {
      return obj && typeof obj === 'object' && obj.nodeType === 1 && typeof obj.nodeName === 'string';
    }
};
const MyPlugin = {}
MyPlugin.install = function (Vue, options) {
  // 4. 添加实例方法
  Vue.prototype.$print = Print
}

export default MyPlugin
